Features: Experience efficient cooling with 4010 Double Ball Bearing DC5V 12V Brushless Cooling Fan, to deliver airflow and reduce overheating in electronic devices. This fan features construction with black PBT housing and 7blades, ensuring durability and high performances with noise level of just 27.50dB (A). for enthusiasts and hobbyists, this fan for anyone lookings to enhanceds the cooling systems of their small electronics or projects. for use in 3D printers, mini PC case, routers, TVs boxes, headsets, and other small electronic devices requiring effective ventilation. With long lifespan of 50,000 hours at 25 degrees, this RoHS compliant fan ensures operations for cooling needs. Specifications: Material: ABS Side length: 4cm/1.57inch Styles: 5V, 12V (optional) Package Includes: 1PC 40mm Cooling Fan note: Please allow 0-1cm error due to manual measurement. make sure not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.